PAC AOEM-GM24 Interface to Allow the Addition of an Amplifier in Select 2004-up GM Vehicles with a Factory Amplified Bose Sound System Designed To Add An Amplifier To The Factory Audio System Allows clean audio quality Plug and play Interface that Allows the Replacement or Addition of an Amplifier in Select GM Vehicles With a Factory Amplified Bose Sound System Interface is transformer isolated Maintains phase Linear from 20-20,000 Hz Provides 2:1 gain and infinite attenuation